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Since this circuit breaker is connected to the 15kV side of the transformer and the one-line doesn’t say anything different, you can assume it can handle 15kV. After the transformer’s draw out circuit breaker (A1), it is connected to a heavier, horizontal line. This horizontal line is an electrical bus. 断路器（英语： Circuit Breaker ，简称CB），广泛使用于工业生产和日常生活中，主要功能是合上和断开回路（ON/OFF POWER）。别名:空气开关、保险掣、无熔丝开关。断路器会在短路和严重超载的情况下切断电路，从而有效的保护回路中的电器。 高压用断路器，最常见为气体断路器和真空断路器，35kV及以下电力系统中，多采用真空断路器；35kV以上电力系统则多采用气体断路器 ... What is Auxiliary contact? Auxiliary contacts (or switches) are supplementary contacts that are added to a circuit to protect the main contact. This accessory allows you to check the status of a Miniature Circuit Breaker or Supplementary Protector from a remote. Simply explained, it aids in remotely determining whether the breaker is open or closed. This device can be used for a variety of purposes other than remote status indication. Trip Curve of MCB: The Trip Curve is a graphical representation of the circuit protection devices. Fuse, MCB’s, MCCB’s, supplementary protectors, motor protection circuit breakers, overload relays, electronic fuses, and air circuit breakers are all examples of circuit protection devices. The multiples of the current going through the miniature circuit breaker are represented on the horizontal X-axis. […]
